Patent GB-215733-A (GB)
Title: Improvements in machines for use in the manufacture of textile fabrics
IPC: D03D3/00
Filed: 1924-04-25
Abstract: 215,733. Electro Magnetic Loom Corporation, (Assignees of Bauer, C. G.). May 7, 1923, [Convention date]. Circular looms; shuttleless looms; take up motions.-In a loom for weaving a tubular fabric around a wire core, or alone, cross strands or weft threads 23, Figs. 1 and 6, from cops 24 are inserted between longitudinal strands or warps 21 from bobbins 22, Figs. 1 and 5, by means of arms 70 on a sleeve 74, which is rotated on a fixed tubular member 8 by means of driving- pulleys 80. The arms 70 have horizontal portions 68 furnished with guides 26 for the weft threads, of which four may be used. After a weft thread has passed a particular bobbin, this bobbin is moved from one pin 30 to a companion pin in the same axial line by electromagnetic action, a number of pairs of electromagnets 32 being employed, the coils of which are excited in the required order under the control of a commutator on a shaft 84 driven from the sleeve 24. The pins 30 are of brass or other insulating material and thev are furnished with heads and are mounted in axial apertures in magnet cores 34, which are secured in apertures in fixed arms 36 and are furnished with coils 37 and fibre discs 38. The pins 30 are also provided with flanged sleeves 48 of brass &c. and when a bobbin is transferred from one pin to its companion pin by energizing say the left-hand coil of a pair of electromagnets and simultaneously de-energizing the right hand coil, the bobbin moves from the right to the left hand pin and displaces the left hand sleeve on its pin stressing the corresponding spring 50. When the shed is changed by energizing the right hand coil, and de-energizing the left hand coil, the stressed spring acting on the left hand sleeve immediately forces the bobbin to the right away from the left hand coil. The bobbin flanges are made in two concentric portions, the inner section, which is formed integral with the bobbin core, being of magnetic material and the outer section of fibre &c. The pins 30 can be retracted bv means of knobs 56 to facilitate removal of the bobbins. A commutator arrangement is described for operating the pairs of electromagnets in sets of four, a corresponding magnet of each pair being energized whilst the other magnet is de-emergized, and the pairs of electromagnets between each such set of four being successively operated correspondingly. The bracket arms 36 are formed on members 58, 62 secured to fixed tubular members 8, 10 provided with guiding sleeves 14, 18 for the wire 12 to be covered and for the covered wire, which passes on to a feed wheel 146 driven frictionally by a pinion 154 on a shaft 158 rotated by ratchet gearing and crank gearing from the shaft 84. The friction pinion can be adjusted longitudinally on its shaft to vary the speed of the feed' wheel. When the tubular fabric is not Woven on to a wire, a forming mandrel is used. The Specification as open to inspection under Sect. 91 (3) (a) refers to the use of certain features of the invention in braiding-machines. This subject-matter does not appear in the Specification as accepted.